Buttcontact and angular contact welding seam corrosion detection sensors were designed respectively.
分别设计了适合对接和角接焊缝腐蚀检测的两种传感器。
2
Butt we, who live indoors, have lost contact with the moon.
但生活在室内的我们，已经失去了和月亮的联系。
3
End face with a gap, no boss butt is refers to the upper and lower casing left a certain gap between the upper and lower main chord rod end face at the same time contact.